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<A href="introduction6.htm">Debugging Tools for Windows (WinDbg, KD, CDB, NTSD)</A> &gt; <A href="debugger_reference.htm">Debugger Reference</A> &gt; <A href="debugger_commands.htm">Debugger Commands</A> &gt; <A href="meta_commands.htm">Meta-Commands</A> &gt; </div>
	<div id="winchm_template_title">.cache (Set Cache Size)</div>
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	<div id="winchm_template_content"><div id="mainSection"><p>The <b>.cache</b> command sets the size of the cache used to hold data obtained from the target. Also sets a number of cache and memory options.</p>
<pre class="syntax">
    <b>.cache </b><i>Size</i> 
<b>.cache </b><i>Option</i> 
<b>.cache</b> 
</pre>
<h2><a id="ddk_meta_set_cache_size_dbg"></a><a id="DDK_META_SET_CACHE_SIZE_DBG"></a>Parameters</h2>
<p></p>
<dl>
<dt><a id="_______Size______"></a><a id="_______size______"></a><a id="_______SIZE______"></a>       <i>Size</i>      </dt>
<dd>
<p>The size of the kernel debugging cache, in kilobytes. If <i>Size</i> is zero, the cache is disabled. The command output displays the cache size in bytes. (The default size is 1000 KB.)</p>
</dd>
<dt><a id="_______Option______"></a><a id="_______option______"></a><a id="_______OPTION______"></a>       <i>Option</i>      </dt>
<dd>
<p>Can be any one of the following options:</p>
<p></p>
<dl>
<dt><a id="hold"></a><a id="HOLD"></a><b>hold</b></dt>
<dd>
<p>Automatic cache flushing is disabled.</p>
</dd>
<dt><a id="unhold"></a><a id="UNHOLD"></a><b>unhold</b></dt>
<dd>
<p>Turns off the <b>hold</b> option. (This is the default setting.)</p>
</dd>
<dt><a id="decodeptes"></a><a id="DECODEPTES"></a><b>decodeptes</b></dt>
<dd>
<p>All transition page table entries (PTEs) will be implicitly decoded. (This is the default setting.)</p>
</dd>
<dt><a id="nodecodeptes"></a><a id="NODECODEPTES"></a><b>nodecodeptes</b></dt>
<dd>
<p>Turns off the <b>decodeptes</b> option.</p>
</dd>
<dt><a id="forcedecodeptes"></a><a id="FORCEDECODEPTES"></a><b>forcedecodeptes</b></dt>
<dd>
<p>All virtual addresses will be translated into physical addresses before access. This option also causes the cache to be disabled. Unless you are concerned with kernel-mode memory, it is more efficient to use <b>forcedecodeuser</b> instead.</p>
</dd>
<dt><a id="forcedecodeuser"></a><a id="FORCEDECODEUSER"></a><b>forcedecodeuser</b></dt>
<dd>
<p>All user-mode virtual addresses will be translated into physical addresses before access. This option also causes the cache to be disabled.</p>
<div class="alert"><b>Note</b>    You must activate <b>forcedecodeuser</b> (or <b>forcedecodeptes</b>) before using <a href="#Bookmark2194"><b>.thread (Set Register Context)</b></a>, <a href="#Bookmark2072"><b>.context (Set User-Mode Address Context)</b></a>, <a href="#Bookmark2156"><b>.process (Set Process Context)</b></a>, or <a href="#Bookmark2435"><b>!session</b></a> during live debugging. If you use the <b>/p</b> option with <b>.thread</b> and <b>.process</b>, the <b>forcedecodeuser</b> option is automatically set. In any other case, you will need to use the <b>.cache forcedecodeuser</b> command explicitly.</div>
<div> </div>
</dd>
<dt><a id="noforcedecodeptes"></a><a id="NOFORCEDECODEPTES"></a><b>noforcedecodeptes</b></dt>
<dd>
<p>Turns off the <b>forcedecodeptes</b> and <b>forcedecodeuser</b> options. (This is the default setting.)</p>
</dd>
<dt><a id="flushall"></a><a id="FLUSHALL"></a><b>flushall</b></dt>
<dd>
<p>Deletes the entire virtual memory cache.</p>
</dd>
<dt><a id="flushu"></a><a id="FLUSHU"></a><b>flushu</b></dt>
<dd>
<p>Deletes all entries of ranges with errors from the cache, as well as all user-mode entries.</p>
</dd>
<dt><a id="flush_Address"></a><a id="flush_address"></a><a id="FLUSH_ADDRESS"></a><b>flush </b><i>Address</i></dt>
<dd>
<p>Deletes a 4096-byte block of the cache, beginning at <i>Address</i>.</p>
</dd>
</dl>
</dd>
</dl>
<h3><a id="Environment"></a><a id="environment"></a><a id="ENVIRONMENT"></a>Environment</h3>
<table>
<tr>
<td>
<p><b>Modes</b></p>
</td>
<td>
<p>kernel mode only</p>
</td>
</tr>
<tr>
<td>
<p><b>
          Targets</b></p>
</td>
<td>
<p>live debugging only</p>
</td>
</tr>
<tr>
<td>
<p><b>
          Platforms</b></p>
</td>
<td>
<p>all </p>
</td>
</tr>
</table>
<p> </p>
<h2>Remarks</h2>
<p>If <b>.cache</b> is used with no arguments, the current cache size, status, and options are displayed.</p>
<p>The <b>.cache forcedecodeuser</b> or <b>.cache forcedecodeptes</b> option will only last as long as the debugger remains broken into the target computer. If any stepping or execution of the target takes place, the <b>noforcedecodeptes</b> state will again take effect. This prevents the debugger from interfering with execution or a reboot in an unproductive manner.</p></div></div>	
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